Hi everybody, I have seen that people is asking questions about impedance matching network design from time to time. Impedance matching network is used in almost all kinds of microwave/RF circuits, in order to reduce reflection, or increase output power.
Here is a TRUE free software (free of charge, also free of tedious registration) dedicated for wind-band impedance matching network design and optimization. This software is called IMNLab. It is a numerical based optimization tool and can match any complex-valued port impedance to the ideal impedance (50/75 Ohm or any other special target impedance).
Here is the homepage of this nice (I vote it as "nice" because it is very useful, and more important free) software: https://imnlab.wordpress.com/